Question 1

How many days does January 1980 have?

Accepted Answer

January 1980 has 31 days. It starts on Tuesday and ends on Thursday.

Question 2

What ISO week does January 1980 start in?

Accepted Answer

1 January 1980 falls in ISO week 1. Weeks run Monday–Sunday per ISO 8601.

Question 3

Where can I see the public holidays of San Marino in January 1980?

Accepted Answer

The calendar on this page marks every national public holiday of San Marino in January 1980 in red, with joint/regional days in amber.

gennaio 1980